Figure 16 in Growth and textural ageing in long bones of the American alligator Alligator mississippiensis (Crocodylia: Alligatoridae)

Figure 16. Histology of normal persistent coarse surfaces. A, Sharpey's fibres (arrows) visible as black thread-like structures beneath the bone surface (FWC LGS8, tibia section a). B, collateral ligament attachment site (FWC 40583, femur section e). C, fourth trochanter. Arrow indicates recently enclosed channel (FWC 40723, femur section b). D, attachment of m. puboischiofemoralis (FWC LGS1, femur section b). E, lateral (cranial) surface of deltopectoral crest (FWC 40723, humerus section b). F, humeral proximal cranial (ventral) surface. Arrows indicate recently enclosed channels (FWC 35119, humerus section a). Scale bars: A = 230 µm; B–F = 919 µm.